Delivery mechanism



Oct. 30, 1928. 1,689,431

w. o. HALL DELIVERY MECHAN I SM ori inal Filed Feb. 36, 1923 5Sheets-Sheet 1 3%, M, i m M,

Oct. 30, 1928. 1,689,431

w. o. HALL DELIVERY MECHANI SM Original Filed Feb. 26, 1925 5Sheets-Sheet 2 w. o. HALL DELIVERY MECHANISM Oct. 30, 1928.

Original ile Fe 2 1925 5 SheetsSheet 3 gwue ntox Won, M,

IIIIIIIIIIIIIII Oct. 30, 1928. 1,689,431

w. o. HALL DELIVERY MECHANI SM Original Filed Feb. 26, 1923 5Sheets-Sheet 4 W. O. HALL DELIVERY MECHAN I SM Original led Feb- 26,1925 5 SheetsSheet 5 5 9 mum m, Kym wm,

Patented Get. 30, 1928.

UNITED STATES lA'lENT OFFICE.

WALTER O. HALL, OF FRANKLIN, MASSACHUSETTS, ASSIGNOR, BY DIRECT ANDMESNE ASSIGNMENTS, TO AMERICAN TYPE FOUHDEES COMPANY, OF JERSEY CITY,NEW JERSEY, A CORPORATION OF NEW DELIVERY IIZECHANISM.

Original application filed February 26, 1923, Serial No. 621,438.Divided and this application filed June 12,

This application is a division of my eopending application Serial No.621, l38, filed February 26, 1923, for improvements in ransfermechanisms for printing presses.

The present invention relates to sheet transfer mechanism for printingpresses of the oscillating type, more commonly called job presses, andis particularly adapted for use with presses of this type which have anoscillating platen and a stationary bed, such as the Golding press.

The problem of producing a practical and eliicient automatic sheet feedand delivery for printing presses of the oscillating-platen crank driventype, is of great complexity and difficulty as compared with the problemof producing an automatic device of this kind for presses of thestationary-platen-oscillating-bed type and presses with oscillatingplaten and bed. Several practical automatic feed and delivery deviceshave been produced for presses of the latter types, but so far as I amaware no practical mechanism has heretofore been produced for presses ofthe stationary-bed crank-driven and oscillating-platen-type. Thedifficulty due to the movements of the platen on which the sheets are tobe deposited and from which the printed sheets are to be taken, and theconsequent necessity of so timing the movements of the feeding devicesand the delivery devices relative to each other and relative to theoscillation of the platen that they will deposit the sheets on theplaten and take the printed sheets therefrom smoothly and withoutinterference with each other or with the platen.

The object of the present invention is to overcome the ditlicultyreferred to above and produce a practical and efficient sheet feed anddelivery for presses of the oscillatingplaten cranlcdriven type; and tothis end the invention resides in mechanism which will hereinafter beparticularly described and the novel features whereof will be pointedout in the claims.

Although the present invention has been designed with particularreferences to pressesof the oscillating-platen crank-d iven type, thereare certain features of the invenlion that are applicable to presses ofother types, will be apparent hereinafter.

vGenerally stated, the shoe feeding and delivery mechanism of thepresent invention comprises two or more pairs of horizontally alignedsheet feeding fingers mounted to oscillate bodily in vertical planesintersecting the platen and moving in paths extending from elevatedpoints in front of the press to points adjacent the lower edge of theplaten, and a similar set of delivery fingers mounted to oscillate in apath, be low the path of the feeding fingers, extending from points infront of the press to points on the face of the platen adjacent the tailedge of the sheet thereon; combined with automatic meansfor closing thefeed ing fingers on a sheet, presented thereto by a suitable sheetfeeding device, and for open ing said fingers when they approach thelimit of their movement towards the platen, to deposit the sheetthereon; and automatic devices for closing the delivery fingers on thetail edge of a sheet carried by the platen, and opening said fingers torelease the sheet when the lingers approach the opposite limit on theirmovement. The means for oscillating the feeding fingers preferablyincludes crank and lever mechanism operating to slow down the movementof said fingers as they approac 1 and recede from the terminal points,so as to allow suiiicient time for the platen to open and clear saidfingers as they cross the edge of the platen, and so as to permit thedelivery fingers to abstract the printed sheet from the platen beforethe feeding fingers deposit the blank thereon. The means for oscillatingthe delivery fingers also comprises crank and lever mechanism andpreferably said mechanism includes two separate gear trains from theoperating shaft of the press so designed as to impart to said fingers aresultant move ment whichis accelerated while said fingers are moving toand fro over the platen, to cause said fingers to move quickly acrossthe platen, grasp the sheet thereon, and move quickly back out of theway of the feeding fingers, which are simultaneously moving over theplaten but with a relatively low velocit- In this manner the feeding anddeliv devices are projected and retracted across the face of the platenin such timed relation to the osci lation thereof and with such relativevelocities that the sheets are deposited thereon and abstractedtherefrom smoothly and without interference.

Referring to the accompanying drawings for a particular description ofmechanism en'ibodying the present invention:

Fig. 1 is a side view of sheet feeding and delivery mechanismconstructed in accordance with the invention and appli d to a Goldingpress;

Fig. 2 is a front elevation, looking towards the right of Fig. 1;

Fig. 3 is a plan view looking down on Fig. 1 of the sheet feeding anddelivery carriages and their associated operating mechanism;

4 is a sectional plan view taken on line 44 of Fig. 1;

Fig. 5 is a detail side view of the means for mounting and operating thesheet gripping fingers;

Fig. 6 is a detail view illustrating the position of parts when thedelivery gripper fingers are in open position;

Fig. 7 is a detail view of a shaft on which the upper gripper fingersare adapted to be mounted;

Fig. 8 is a plan view of a carriage for the delivery mechanism showing amodification of means for adjusting the throw of said carriage;

Fig. 9 is a detail view of a driving means for the delivery carriage;

Fig. 10 is a detail view illustrating the adjustable mounting of thesheet gripping fingers; and

Fig. 11 is a detail view showing clamping devices between the auxiliaryframe and frame of the press.

Referring to the drawings, Fig. 1 shows only suificient parts of a pressof the Golding type to illustrate the application of the presentinvention thereto. A designates the frame; 13, the stationary form bed;and C, the oscillating platen. The platen. pivoted to the frame at D. isoperated by well known mechanism shown partly in dotted lines in Fig. 1.Said mechanism is operated from a power or driving shaft 1 carrying a.pinion 2 which meshes with a large gear 3 on a main operating shaft 4;and comprises a crank 5 on shaft 4, a link 6 connecting said crank toradius bars 7; a toggle 8, 9 connecting the radius bars to the platen,and a pair of draw bars 10 connecting the toggle with frame A andextending across the ends of the platen.

The sheet feeding and delivery mechanism is adapted to be mounted on anauxiliary frame attached to the press frame A. and extending across andspaced. from the front of the press. This auxiliary frame is shown inside elevation in Fig. 1 and in front elevation in Fig. 2. It is ofrectangular form and comprises vertical side bars 11 connected at theirupper ends by a horizontal bar 12 and braced at their lower ends by arod 13. Said auxiliary frame is preferably pivotally mounted at the sideon the press frame, so that it may be swung horizontally, with the sheetfeeding and deliverymechanism carried thereby, ninety degrees or morefrom operative position, to permit access to the press. F or thispurpose one of the side bars 11 has a pair of parallel arms 14 extendingtowards the press and terminating in bifurcations 14"- which are adaptedto straddle lugs 15 formed on the ends of a pair of brackets 15 securedto and projecting from the sides of frame A. The bifurcated ends of armshave vertical perforations which register with perforations in the lugsof brackets 15, and pins 14 passing through these perforations pivotallyconnect the frames. The other side bar 11 has a pair of parallel arms 14which extend towards the frame 15 and terminate in right angularportions 14 which have open slots to receive threaded bolts 14 hinged tothe frame. Bolts 14 are provided with knurled pieces 14. When the pieces14 are unscrewed and bolts 14 swung out of the slots in 14 and theoperating links between the driving shaft of the press and the sheetconveying mechanism are disconnected, the auxiliary frame and saidmechanism may be swung about a vertical axis to the side entirely out ofthe way of the bed and platen.

he mechanism for feeding sheets to the platen comprises two or morepairs of sheet gripping fingers supported from a pair of arms 16, whichare keyed to the ends of a horizontal shaft 17 journaled in the sidebars 11. The arms 16' are oscillated by mechanism comprising a link 18connected at one end to one of said arms and at its other to a crank 19secured to the large gear wheel 3. Each pair of sheet gripping fingers,as more clearly shown in Figures 5, 6 and 10, consists of an uppermovable finger 20 and lower relatively stationary finger 21. jfhe upperfingers 20 are secured to split collars 2O which are adjustably mountedon a shaft 22, which extends transversely between the arms 16 and isrotatably supported in the ends of said arms. The lower relativelystationary lingers 21 are attached to dove-tail blocks 21 which arefrictionally held in a dove-tail groove formed on the underside of a rod23, which acts both as a support for said fingers and a tie rod for arms16. The 0 1 e lingers are tnus HdJUSlZLblG longitudinally 01 the shaftand rod to suit sheets of different widths.

Secured to shaft 22 outside of the arm 16 is an arm 24 carrying a roller25 at its free end. Inside of the arm 16 the shaft 22 carries a collar26 in which is formed a notch 27. A. spring 28, secured at one end toarm 16 and at its other end to shaft 22, tends to rotate said shaft in adirection to close the ill?) ill) fingers on the relatively stationaryfingers 21. The fingers 20 are moved to open position, or cocked, byroller coming in contact with draw bar 10, as the feeding mechanismapproaches the limit of its movement towards the platen. Said fingersare held open during the return movement of the feeding mechanism, anduntil the latter approaches the limits of its movement toward a pile ofsheets, by means of a pawl 29 engaging the notch 27 in collar 26. Pawl29 is attached to or integrally formed with an arm 30, which is pivotedon the tie rod 23 inside of the arm 16 and urged by a suitable spring ina direction to engage said pawl with the notch. An arm 30 carries aroller 31 which engages a cam 32 when the sheet feeding mechanismapproaches the limit of its movement towards the sheet pile. As saidroller travels along the cam, arm 80 is rotated in a direction to raisethe pawl out of the notch, permitting spring 28 to rotate shaft 22 andclose, or uncock, fingers 20. As said fingers close, they grip a sheetagainst the relatively stationary fingers. 21, said sheet having beenpresented to grippers 20 and 21 by any suitable automatic sheet feedingdevice.

The mechanism for taking the printed sheets from the platen anddelivering same to a suitable conveyor comprises sheet gripping fingerssupported by a carriage which reciprocates on a fixed track 34 rigidlyattached at one end to a side of the auxiliary frame. Like the saidgrippers, the delivery grippers consist of two or more pairs of fingers,the members of which are mounted respectively on a shaft and a rodextending transversely between the sides of the car riage. Each pair ofthese fingers consists of a relatively stationary lower finger 35adjustably secured to the underside of a tie rod 36, and an uppermovable finger 37 adjustably mounted on the upper side of a shaft 37.The fingers are adjustable longitudinally of the shaft and rod toconform with differences in sheet widths.

An arm 88 on shaft 37 has anotched boss, formed with a notch 38 which isadapted to be engaged by a pawl 39 secured to an arm 39 which is pivotedon tie rod 36; and the shaft 37 is urged by a suitable spring 37", in adirection to close fingers 37 on, the relative 1y stationary fingers 35,the construction be ing similar to the construction of the controllingmeans for the f ed fingers above described.

lVhen carriage 33 approaches the limit of its movement away from theplaten, a roller 38" on arm 38 contacts a cam 40 (Fig. 2), which isadjustably mounted on a bracket 4O projecting inwardly from a side bar11. This causes rotation of shaft 37? and conse quent opening, orcocking, of fingers 39, and causes release of the sheet. Fingers 39 areheld open, or cocked, during the return movement of the carriage, anduntil the latter approaches the limit of its movement towards theplaten, by the pawl 39 on arm 39engaging the notch in the boss of arm38. As the carriage approaches the limit of its movement towards theplaten the tail edge of the sheet thereon enters between the grippingfingers and the roller 39" on arm 39 contacts a projection on theplaten, thus moving the pawl out of the notch 38 and permitting shaft 37to uncock fingers 39, and rotate them in sheet clamping relation to there? tively stationary lingers 35.

The carriage 33 is operated by mechanism now to be described. Journaledon shaft 17 inside the arms '16, are a pair of spaced toothed segments41 which are rigidly connected together by a bar One of the segments 41is connected to one end of a link 4-3, the other end of which isbifurcated to straddle shaft 4. A cap 1 attached to the ends of thebifurcated portions of link at?) carries a collar 45 which operates in acam track -16 formed on the inner face of a disc .27 keyed on shaft 4. Asleeve l8 on shaft 17 extends completely between the segment l1 andformed integrally with said sleeve are two arms 49 which extend upwardlyadjacent the segments 41 and have pivoted at their upper ends a pair oftoothed segments 50 which mesh with the segments 41. Secured to segments50 are upwardly extending arms 51 on the free ends of Which are pivotedswivel blocks 52.

Blocks 52 are bored through to receive tubular extensions on carriage33, being adjustahly secured to the blocks by set.

screws Formed integrally with sleeve 48 at one end thereof, is adepending arm 54 which is pivoted to one end of a link- 55, the otherend of said link being connected to a crank-56 on the shaft 4. i

In Fig. 1 the platen is shown in open posi tion with the sheet feedingdevices moving thereover towards their sheet depositing position with asheet S, while the sheet delivery devices are at the limit of their movement towards the platen with the gripping fingers thereof closed on thetail edge of a printed sheet. The shaft 4 is moving counter-clockwiseand the crank 19 is pulling the link 18 and moving the arms 16downwardly, while the crank 56 and the cam 46 are on the point of movinglink 55 to the right of the link l3 to the left, as viewed in Fig. 1, Asshaft 4 continues to rotate from the position shown in Fig. 1, the camtrack 46 will. move the link 4t?) to the left with a relatively quickmovement while the crank 56 will operate to move link 55 to the right.Hence segments 41 will rotate in a clockwise direction while arms 4-9will rotate in a counter-clockwise direction Segments 50 and the arms 51rigid therewith will thus be rotated counter-clockwise bodily about theaxis of shaft 17 and also in the same direction about their pivotalconnections with arms 49, the bodily movement of said segments beingderived from the rotation of arms by the link 55 and crank 56 and thepivotal movements of said segments on said arms being derived from therotation of segment ll and also from the bodily movement of segment 50on segment 11. Hence the arms 51 have a resultant movement which isproduced by the two separate cam and crank connections, and as will beobvious by an inspection of the construction and relative position ofthe parts shown by Fig. 1, the motion of arms 51 is greatly acceleratedduring the movements of the delivery fingers over the platen face. Hencethe delivery fingers will move down quickly over the platen to theposition shown in Fig. l seize the sheet thereon, and move same withequal quickness out of the way of the sheet which the feed fingers areon the point of depositing.

lVhile the delivery fingers are thus moving over the platen to seize theprinted sheet and take same to a suitable point of delivery, the crank19 is moving the arms 16 with the feed fingers carried thereby frompoints adjacent the pile P of sheets, down over the platen to theirsheet depositing position. When arms 16 approach the limit of theirdownward movement, the roller 25 on arm 24: makes contact with draw bar10, thus rotating fingers 20 and releasing the sheet, which falls on theplaten, the progress of said sheet being stopped by register fingers 57which are adjustably attached in any known manner to the lower edge ofsaid platen. The feed fingers have a slightly further downward movementafter depositing the sheet which permits them to clear the head of thesheet on their return move ment, said fingers during this furthermovement operating to hold said sheet down on the platen.

As the delivery mechanism approaches the limit of its movement away fromthe platen the roller 38 on arm 38 makes contact with the cam 40,rotating fingers 37 and releasing the sheet held thereby. Any suitablecon veying means may be employed for receiving the sheets from thedelivery fingers and con veying same to a desired point. Fingers 3? areheld in open position by the pawl 39 on arm 39 engaging the notch 38 inthe boss of arm 38 and are held open until the roller 89 on arm 39 makescontact with a projection on the platen outside of the sheet after thefingers have received between them the tail edge of the printed sheet.It will be observed that the delivery mechanism has a substantial dwell.at the limit of its movement away from the platen, due to the fact thatthe cam track 46 is substantially con centric with shaft 4: and thecrank 56 is passing over its dead center while the mechanism ccupiesthis position, This gives ample time for the sheet to fall from sheetdelivery firngers and makes it possible to produce the quick movementsof said fingers over the platen. It will also be observed that due tothe relative positions of the axes of shafts 17 and 4, the crank 19 willgive a relatively slow movement to the arms 16 and the feed mechanismcarried thereby while said mechanism is approaching the platen and afast movement away from the platen. Hence ample th e will be allowed forthe platen to open and clear the feeding fingers as they cross the edgethereof and for the delivery fingers to withdraw the printed sheet fromthe platen before the feeding mechanism deposits a sheet thereon.

As the sheets operated on vary in width, it is necessary to adjust forthese variations. Therefore the feeding fingers are mounted so that theymay be clam ed or secured at different points on the shafts 22 and rod23, while the delivery fingers are adjustable in a similar manner on theshaft 3'? and rod 36, as shown in Figure 10, and the register fingers 57are attachable at different points along the edge of the platen. Bythese means the mechanism is adjustable for any width sheet within theplaten range. For adjusting to suit different lengths of sheets thecarriage 33 is moved relatively to the swivel blocks 52 and clamped bythe set screws 53 or other suitable clamping means inproper position forthe particular length of sheet operated on.

Figure 8 illustrates a modification of the means for adjusting thecarriage relatively to the swivel blocks. In this modification the boresof the swivel blocks are threaded to receive threaded shafts 58, whichare rotatably mounted in a cross piece 59 of the carriage. A shaft 60journaled in the sides of the carriage has bevel gear connections withthe ends of sheets 58, and said shaft 60 has a square end 61 which isadapted for engagement by a suitable tool, whereby said shafts may berotated and the carriage moved closer to or further from the swivelblocks 52, according as the sheets are longer or shorter.

Although an embodiment of the invention has been described in detail, itis not limited to the form shown but includes modifications and changeswith the scope of the appended claims.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. Automatic sheet delivery mechanism for printing presses of theoscillating type, including in combination, sheet gripping fingersmounted for reciprocation in a curved path extending from the face ofthe platen adjacent the tail edge of the sheet operated on J on topoints Outside the press, means for reciprocating said fingers in timedrelation to the oscillation of said press, including a swinging memberhaving a pivot below the path of the sheets, said means being adjustablewhereby the termination of the path of the gripping fingers on theplaten f ce may be varied in accordance with the length of the sheets,means for opening said fingers when they approach the limit of theirmovement away from the platen, means for holding said fingers openduring the movement toward the platen, and means for releasing saidholding means to permit said fingers to close on a sheet when saidfingers approach the limit of their movement towards the platen.

2. In combination with a printing press of the oscillating type, sheetdelivery mechanism comprising a pluraltiy of pairs of horizontallyalined sheet gripping fingers mounted for reciprocation in parallelvertical planes intersecting the platen, means operated in timedrelation to the oscillation of the press for reciprocating said fingersin curved paths extending from points substantially on the platen facewell below the upper edge of the platen to points outside the press,including a swinging arm having a pivot spaced from the concave side ofsaid path, and automatic means for actuating said gripping fingers asthey approach the limits of their movement, to cause said fingers totake a sheet from the platen and release same at a point outside thepress.

8. In combination with a printing press of the oscillating type, sheetdelivery mech anism comprising a carriage, a track guiding said carriageto and from the platen, means for reciprocating said carriage in timedrelation to the oscillation of the press, said means operating to impartto said carriage an accelerated motion over the platen and a substantialdwell at the limit of its v movement away from the platen, sheetgripping devices mounted on said carriage, and means for actuating saidgripping devices to cause them to take a sheet from the platen andrelease same at points outside the press.

4:. Automatic sheet delivery mechanism for printing presses of theoscillating platen type, comprising sheet gripping fingers mounted toreciprocate in a curved path extending from points substantially on theface of the platen well below the upper edge thereof, when the latter isopen, to points in front of the press, means for reciprocating saidfingers in timed relation to the oscillation of said platen including aswinging arm approximately normal to said path throughout its movement,means for opening said fingers to release the sheet carried thereby whensaid fingers approach the limit of their movement away from the platen,means for a. holding said fingers open, and means for releasing saidholding means to permit said fingers to close on a sheet carried by thelaten when said fingers approach the limit of their movement towardssaid platen.

Automatic sheet delivery mechanism fur printing presses of theoscillating platen type, comprising sheet gripping fingers mounted toreciprocate bodily in a curved path extending from points substantiallyon the platen face and sharply inclined to the plane of said face, whenthe platen is fully open, to elevated points in front of the press,means for adjusting the limit of the movement of said fingers towardssaid platen, means for reciprocating said fingers in timed relation tothe oscillation of said platen, means for opening said fingers when theyapproach the limit of their movement away from the platen, means forholding said fingers open, and means for releasing said holding means topermit said fingers to close when they approach the limit of theirmovement towards said platen.

6. In combination with a printing press of the oscillating platen type,sheet delivery mechanism comprising a plurality of pairs of horizontallyalined sheet gripping fingers mounted to reciprocate in parallel pathsintersecting the platen at an angle sharply inclined to the plane of theplaten and located well below the upper edge of said platen, meansoperated in timed relation to the oscillation of said platen forreciprocating said fingers in said paths, and automatic means foractuating said gripping fingers as they approach the limits of theirmovements to cause said fingers to take a sheet from the platen andrelease same at a point in front of the press.

7. In combination with a printing press of the oscillating platen type,sheet delivery mechanism comprising a plurality of pairs of horizontallyalined sheet gripping fingers mounted to reciprocate in parallelvertical planes intersecting the platen, means operated in timedrelation to the oscillation of said platen for reciprocating saidfingers in curved paths from points substantially on the platen face,when said platen is fully open, to elevated points in front of thepress, the prolongations of said paths interseating the platen at smallacute angles, said means being adjustable to vary the limit of movementof said fingers towards said platen, and automatic means for actuatingsaid gripping fingers as they approach the limits of their movements, tocause said fingers to take a sheet from the platen and release same atan elevated point in front of the press.

8. In combination with a printing press of the oscillating platen type,sheet delivery mechanism comprising a plurality of pairs of sheetgripping fingers mounted to reciprocate in vertical parallel planesintersecting the platen face, means actuated by an operating shaft ofthe press for reciprocating said fingers from points substantially onthe platen, when the latter is open, to elevated points in front of thepress, said means operating to accelerate the movement of said fingersover the platen face, and automatic means for closin said gripperfingers when they approach the limit of their movement towards theplaten and for opening said fingers when they approach the oppositelimit of their movement.

9. In combination with a printing press of the oscillating platen type,sheet delivery mechanism comprising an upwardly extending arm mounted infront of the press, means actuated by an operating shaft of the pressfor oscillating said arm towards and from the press, a transverselyextending carriage having a pivotal connection with the upper end ofsaid arm and adapted to be reciprocated thereby across the face of theplaten, said pivotal connection being adjust-- able to vary the limitsof carriage movement, means for guiding said carriage, and sheetgripping devices mounted on said carriage.

10. In combination with a printing press of the oscillating platen type,sheet delivery mechanism comprising a transversely extending carriage, atrack guiding said cari'iage for reciprocation to and from the platen,means for reciprocating said carriage in timed r lation to theoscillation of said platen, said means operating to give said carriagean accelerated motion over the face of said platen, sheet grippingdevices mounted on said carriage, and means for actuating said grippingdevices to cause them to take a sheet from the platen and release sameat an elevated point in front of the press.

11. In combination with a printing press of the oscillating platen type,sheet delivery mechanism comprising an upwardly extending arm mountedin. front of the press, sheet gripping devices connected to said arm andadapted to be reciprocated thereby across the platen face, connectionsbetween said arm and an operating shaft of the press for oscillatingsaid arm in timed relation to the oscillation of said platen, saidconnections being constructed to give said gripping devices a relativelyquick motion as they travel to and fro across the platen face.

12. In combination with a printing press of the oscillating platen type,sheet delivery mechanism comprising an upwardly extending arm mounted infront of the press, sheet gripping devices connected to said arm andadapted to be reciprocated thereby across the platen face, a drivingconnection between said arm and an operating shaft of the press, aseparate driving connection between said arm and said shaft, wherebysaid arm is oscillated with a resultant motion derived from saidseparate connections, said connections being so constructed that saidresultant motion is accelerated as said gripping devices move over theface of said platen.

13. In combination with a printing press of the oscillating platen type,sheet delivery mechanism comprising a transverse horizontal shaftmounted in front of the press, a pair of rigidly connected spacedtoothed segments rotatable on said shaft, a depending arm rigid with oneof said segments, a disc on the operating shaft of the press having acam track on a face thereof, a link connected at one end to saiddepending arm and having its other end engaging said cam track, a sleeveon said shaft between said segments, upwardly extending arms rigid withsaid sleeve, toothed segments pivoted on said arms meshing with saidfirst mentioned toothed segments, a depending arm rigid with saidsleeve, a crank on said press operating shaft, a link connecting saidcrank to said depending arm, upwardly extending arms rigid with saidsecond mentioned toothed segments, blocks swivelled in the upper ends ofsaid last mentioned arms, a carriage having extensions passing throughsaid locks and adjustably fastened thereto, a stationary cam track, aroller on said carriage travelling on said track, a transverse shaftjournaled in the sides of said carriage, a tie rod connecting saidsides, upper and lower sheet gripping fingers adj ustably fixed to saidshaft and rod respectively, said shaft being biased to hold said fingersclosed, an arm on said shaft, a stationary adjustable cam adapted tocontact said arm and open said fingers when said carriage approaches thelimit of its movement away from the platen, a detent holding said shaft,an arm connect-ed to, said detent, and means to contact said lastmentioned arm and release said shaft to permit said fingers to closewhen said carriage approaches the limit of its movement towards theplaten.

i l. In combination with a printing press of the oscillating platentype, sheet delivery mechanism adapted to take a printed sheet from theplaten and release same at an elevated point in front of the press,comprising a transverse horizontal shaft journaled in front of thepress, a pair of rigidly connected spaced toothed segments rotatable onsaid shaft, a depending arm rigid with one of said segments, a disc onthe operating shaft of the press having a cam track on a face thereof, alink connected at one end to said depending arm and having a roller atits other end engaging said cam track, a sleeve on said shaft betweensaid segments, upwardly extending arms rigid with said sleeve, toothedsegments pivoted on said arms meshing with said first mentioned. toothedsegments, a depending arm rigid with said sleeve, a crank on said pressoperating shaft, alink connecting said crank to said depending arm,upwardly extending arms rigid with said second mentioned toothedsegments, a carriage having extensions pivoted to said arms, a cam trackguidsaid carriage for movement across the face of said platen, and sheetgripping and releasing devices mounted on said carriage.

15. In combination with a printing press of the oscillating platen type,sheet delivery mechanism adapted to take a printed sheet from the platenand deliver same at an elevated point in front of the press, comprisinga pair of toothed segments rotatably mounted on a horizontal axis infront of th press, means actuated by an operating shaft of the press foroscillating said segments, upwardly extending arms rotatably mounted onsaid axis, toothed segments pivoted on said arms meshing with said firstmentioned toothed segments, means actuated by said press operating shaftfor oscillating said arms, upwardly extending arms rigid with saidsecond mentioned toothed segments, a carriage having extensions pivotedto said arms, a cam track guiding said carriage for movement across theface of said platen, and sheet gripping and releasing devices mounted onsaid carriage.

16. In combination with a printing press of the oscillating platen type,sheet delivery mechanism adapted to take a printed sheet from the platenand deliver same at an elevated point in front of the press, compri inga toothed segment rotatably mounted on a horizontal axis in front of thepress, a depending arm rigid with said segment, a disc on the operatingshaft of the press having a cam track on a face thereof, a linkconnected at one end to said depending arm and having a roller at itsother end engaging said cam track, an upwardly extending arm rotatableon said axis adjacent said segment, a toothed segment pivoted on saidarm meshing with said first mentioned toothed segment, a crank on saidpress operating shaft, a link connecting said crank to said upwardlyextending arm, an upwardly extending arm rigid with said secondmentioned toothed segment, a block swiveled to the upper end of saidlast mentioned arm, a carriage having an extension passing through saidblock and adjustably fastened therein, a stationary cam track supportingand guiding said carriage, a transverse shaft journaled in saidcarriage, a rod fixed to said carriage and extending parallel to saidtransverse shaft, upper and lower gripper fingers adjustably mounted onsaid shaft and rod respectively, said shaft being biased to hold saidfingers closed, an arm on said shaft, a stationary adjustable camadapted to contact said arm and open said fingers when said carriageapproaches the limit of its movement away from the platen, a detentholding said sha it, an arm connected to said. detent, and means tocontact said last mentioned arm and release said shaft to permit saidfingers to close when Sid carriage approaches the limit of its movementtowards the platen.

17. In combination with a printing press of the oscillating platen type,sheetdelivery mechanism adapted to take a printed sheet from the platenand deliver same at an ele vated point in front of the press, comprisinga gear rotatably mounted on a horizontal axis in front of the press, acam on the operating shaft of the press, a link connecting said cam tosaid gear for oscillating said gear, an upwardly extending arm rotatableon said axis adjacent said gear, a gear pivoted on said arm meshing withsaid first mentioned gear, a crank on said press operating shaft, a linkconnecting said crank to said arm, an upwardly extending arm rigid withsecond mentioned gear, and sheet gripping and releasing devicesconnected for operation by said last mentioned arm.

18. In combination with a printing press of the oscillating platen type,sheet delivery mechanism adapted to take a printed sheet from the platenand deliver same at an elevated point in front of the press, comprisinga gear rotatably mounted on a horizontal axis in front of the press,means actuated by an operating shaft of the press for oscillating saidgear, an upwardly extending arm rotatable on said axis adjacent saidgear, a gear pivoted on said arm meshing with said first mentioned gear,means actuated by an operating shaft of the press for oscillating saidarm, an upwardly extending arm rigid with said second mentionedgear,,and sheet gripping and releasing devices connected for operationby said last mentioned arm.

19. In combination with a printing press of the oscillating platen type,sheet delivery mechanism adapted to take a printed sheet from the platenand deliver same at an elevated point in front of the press, comprisinga transverse horizontal shaft journaled in front of the press, a pair ofrigidly connected spaced apart toothed segments rotatable on said shaft,a depending arm. rigid with one of said segments, a connection betweensaid depending arm and an operating shaft of the press oscillating saidarm and segments, a sleeve on said shaft between said segments, upwardlyextending arms rigid with said sleeve, toothed segments pivoted on saidarms meshing with said first mentioned toothed segments, a depending armrigid with said sleeve, a connection between said last mentioneddepending arm and said press operating shaft for oscillatin said arm,upwardly extending arms rigid with said second mentioned toothedsegments, and sheet gripping and releasing devices connected foroperation by said last mentioned arms.

20. In a sheet delivery mechanism for printing presses of theoscillating platen type, a cam track fixed at one end extending towardsthe platen, a carriage movable on said cam track, sheet gripping andreleasing devices mounted on said carriage, an upwardly extending armmounted in front of the platen, means for oscillating said arm in timedrelation to the oscillation of said platen, a block swivelled on ahorizontal axis to the upper end of said arm, said block having athreaded bore, a threaded shaft rotatably mounted on said carriage andextending through said bore, and means for rotating said shaft to adjustthe throw of said carriage.

21. In a sheet delivery mechanism for printing presses of theoscillating platen type, an upwardly extending arm mounted in front ofthe platen, means for oscillating said arm in timed relation to theoscillation of said platen, a block swivelled to the upper end of saidarm on a horizontal axis, a carriage mounted for reciprocation over theface of said platen, sheet gripping and releasing devices carried bysaid carriage, and a connection between said carriage and arm comprisinga threaded shaft rotatably mounted on said carriage and screwed throughsaid block.

in testimony whereof I hereunto aiiix my signature.

WALTER O. HALL.

